Head-stock.



A. G. BELDEN.

HEAD STOCK.

APPLICATION FILED ocT. s. 1914.

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HEAD STOCK.

APPLICATION HLEn oc. 5. 1914.

- Patent-ed A-ug. 17, 1915.

2 SHEETS-SHEET 2.

. sion being rmade for `ported-amori the dead centersfrom the rocitizen of 4the UnitedStates,

. use. ported. upon the work upon the dead ALBERT G. BETTEN,

onWonciisTER, MASSACHUSETTS, AssiGNoR To ivonToN GRINDIN Gr COMPANY, OF WORCESTER, MASSACHUSETTS, CORPORATION OF MASSACHUSETTS.

aimais.

T0-all fui/wm #may concern v 4Be it :known that I, ALBERT G. .BELDEN, a v .residing Vat Vorcester, 4inthe county of Worcester and .Statefof Massachusetts, nhaveinvented a new and :useful Headtocln of which the following is a specification.

This invention relates to :a .head stock of ra typeparticularly adapted fon-.use on cylindrical lgrinding machines.. vIn such `machines 4the work is supported Vfor lrotation upon a longitudinally movableywork table andinaybe mounted, according Lto itsnaturd-either. on'a pair :of (il'ead'centersf or in `a chuck supported on the head'stock.

The principal 'obj ectV of `my invention vis 1to `provide improved vmeans Vfor rotating the work upon the centers or -for rotating the chuck, as maybe desired. rvVlith this general object `in view,myinvention,` in the pre ferred form,`contemplates the provision, `in a headstock, of a freely rotatable spindle and means for lockingthe spindle in fixed position. The headcenter and chuck are supported by-thi-s spindle when either is in Adriving member is rotatably sup- 5the spindle andimproved devices are providedfor frictionally connecting the drivingmember to :the spindle when rotationof the -latteris .desired. `At all other times the driving vmember rotates freely with respect to thespindle, ,suitablegprovi- `driving the work suptating driving member.

It Ais one of the objects of my invention to provide an improved device for thus driving centers.

My invention further consists incertain devices, arrangements and combinations of parts `which and more particularly pointed fout in the appendedv claims. V

A Vvpreferred form lof tlie invention is shown inl the drawingsV in which` Figurel is a -side elevation. ofthe head stock,- partly in section; Fig. 2 is a front ele- `vation of the head stock with the chuck and its aceplateremoved; Fig. 3 -is a plan view of certain ofthe parts shown in F ig. .2; and Fig. is a sectional detail viewtaken along the line @-4 in Fig. 1.`

My 'improved headV stock frame 10 angularly adj ustabl 11, which I comprises .upon a base in turn is longitudinally adjustySpecification of Letters (Patent. 4Application med-october 5, 1914..` serial No. 865,037.

thereof which coperate longitudinal movement spindle Ais desired. When operates with one ,of the collar 20.to lock the spindle l9iagainst rotavtion.

mounting the `chuck to i tially cylindrical HEAD-STOCK.

Patented aug. T7, ieia.

able upon awork table 12. The base 11 may be secured in `adjusted Y `table 12 by the bindingbolts ,13 and the :frame 10 issecured in its angularly adjusted position on the base 11 by tliebolts or studs 14. .The iframe lO may be provided with angular 4graduations l5 with a ygage plate ,16 mounted `upon the -Vbase l1, to facilitate the angular adjustment of the head stock.

Therframe `lOsupports bearings 17V and 18 in which lthevspindle 19is freely rotatable. Suitablepi'ovision is made for preventing of the spindle relative to the bearings and the spindle is pro- `vided between the bearings with a collar 20 which may besecured to the spindle by a 21 or infany other convenient manner. The collar 20 provided with one or more recesses 22 adapted to receive the `end of Va:spring-pressed plunger 23 ,mounted upon a casting 24C secured to theframe 10. The Yplunger 23 is provided with a laterally extending lug 25 which may beraised above thecasting W24C and seated in a notch or depression `26, when free rotation of the the plunger 23 is allowed to return to its lower position, it corecesses 22 in the Theusualirtapered center 27 istted with- -finthe spindle 19. and a `chuck 2S of any usualformmaybe mounted upon the-outer end of the spindle. It is customary in secure the same to a face plate 29 `threaded to fit the screw on 4the spindle and having a rearward exten `sion fitting theend of the cylindrical por- 'tion thereof.

will `be `hereinafter described To'providefor the rotation of the spindle or the work supported thereonthefollowing driving, mechanism` is supplied: A substanmember 30 is fixed to the outer end ofthe spindle and may be keyed thereto as shown in Fig. 1. The fixed member 30 provides a bearing for a set of rolls `31supported in a cage 32 and constituting a roller bearing for a driving member 33. As shown in the drawings, the member 33 nis provided with sprocket teeth `311 and is driven bya sprocket chain 35 but any other i convenient means .for rotating themember ,33 -may'be utilized.

The-drivingfmember is provided with positi on upon `the washer 36 upon its rear ythe rolls in position.

When, however,

suchv that itcan rotatable spindle,

.rotatable relatively to said spindle,

Upon its opposite face, themember 33 carries a friction Yplate 37 which extends inward `over a radial sun face of the fixed member 30. The driving devices are inclosed Within a suitable guard or casing 40 and the means form.

such a nature iently supported in the chuck, the chuck and @its face plate are'screwed upon the spindle. @As shown in Fig. 1, the face plate is so proportioned that the rear face of its kouter A4portion will engage the friction plate 37 and force it firmly against the radial surface of frictionally connected to that the driving member 33, the spindle 19, and the chuck 2S will all rotate together.

be. best supported upon dead centers, the chuck 28 and the face plate 29 are .removed and the plunger 23 is lowered to lengage the collar 20. The removal of the face plate 29 relieves the pressure upon the friction plate 37, member 33 is thereafter free to rotate upon its roller bearing, relatively to` the fixed member 30.V n

' In order to drive the Work which is supported upon the dead centers, a driver 41 is pivotally secured to the friction plate 37 by a stud 42, thedriver being provided with the usual. extension 43 -for engaging the work or a dog secured thereto. The driver is also provided with a slot 44 concentric with the stud 42 binding bolt 45 adjusted with sired distance by which the driver may be the extension 43 at any de- `from the center 27. The

driver is thus adapted to readily engage work of any size. Y

From the foregoing description, it will be seen that the change from a dead center to a live spindle is secured merely by screwing the chuck and its face plate upon the spindle and by withdrawing the plunger 23, no further action being necessary to couple the driving member to the spindle.

Having thus described my invention it ,will be evident that many changes and modificatons can be made therein by those skilled in the art without departing from the spirit and scope thereof as expressed in the claims,

. and I do not wish to be otherwise limited to the details herein disclosed, but

Vhat I do claim isr- 1. A head stock having, in combination, a means to at times prevent rotationof said spindle, a driving member a face plate on said spindle, andmeans effective to face whichv retains for drivingthe- 'chain 35 may be of any usual or desired When the work to be operated upon is ofV that it .can be mosty conven-v the nature of Athework is A Vfixed to said spindle,1a

and the driving and adapted to receive a v connect said member and said spindle, said means being controlled'by said face plate and being forced into frictional engagement by said face plate when the frictionally latter is in operative position'on said spiney dle.-

2. V.A head stock having, 'in combination, a

rotation of saidspindle, a driving member rotatable relatively to said spindle, a face plate, and means toy connect said driving member-"to rotate rotatable spindle, means to at times preventV said spindle, saidV means being rendered eifectiveby placing said'face plate in' operativegpositionon said spindle.

3, A head stock having,vin combination, a rotatable spindle,fmeans toV at times Sprevent rotation of Vsaidgspindle, member rotatable 'relatively to said spindle, av frictionplate mounted onsaid member,

and means to cause said plateto engagea surface fixed relatively tossaidy spindle .to thereby drive the latter. f

4.` Ahead stock hav-ing,'incombination, a rotatable A spindle, means said spindle against rotation,

tatable relatively-'to said xed member, and means to cause said driving member to frictionally engage said fixed member, said driving member thereby becoming effective.

to rotate said spindle.

5. Ahead stock having, in combination,

a rotatable spindle, Ameans to at times prevent rotation o'f said spindle, a member fixed to said spindle andsurface, 'a driving-member rotatable relatively to said fixed member, a friction plate mounted` on said driving memberadjacent to said radial surface, and means to Vcause said plate to frictionallyengage :'said'surface thereby rendering the driving member effective to rotate Ysaid spindle.

G. A head stock having, in combination,

a driving hav-ing va radial to attimes lock a memberV drivingv member ro a rotatable spindle, means to 'at times preventrotation of said spindle, a member fixed to said spindle and having a radial surface, a driving member rotatable relatively Vto said fixed member, a friction plate mounted onl said driving member adjacent to said radial surface, anda face plate'on said spindie, the rear surface of said face plate when in operative position engaging said friction plate and forcing the same against the radial surface thereby frictionally Vconneeting the driving member to the spindle.

7. A head stock having,in combination, a rotatable spindle, means to rotate said spindle, means to lock said .spindle against rotation, said latter means comprising a recessed collar on said spindle, and a plunger movable into a recess in said collar tolock said spindle against rotation, and means'to hold said plunger inlretracted position.

8. Ahead stockliaving, in combination,

aspiiidle, a center in saidjspindle, a plate* izo 'rotatably'.supported on said spindle, means ing extension which is thereby movable tolo to drive `said plate, and a driver secured to Ward and fromsaid center. said plate and adjustable 'toward and from In testimony whereof I have hereunto set f said center. y my hand, in the presence of two subscribing 5 9. A. head stock having, in combination, a Witnesses.

spindle, a center in said spindle, a plate sup- Y ALBERT G. BELDEN. ported on said spindle, anda driver pivoted Witnesses: to said plate and angularly adjustable about CHAs. R. SARGENT, its pivot, saiddriver having a Work engag- RAY D. HUBBELL. Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

